Related Experiment Video
Updated: Jan 18, 2026

A PCR-based Genotyping Method to Distinguish Between Wild-type and Ornamental Varieties of Imperata cylindrica
Published on: February 20, 2012
Reinstatement of Cyclocarya serrata (Juglandaceae) based on ploidy, morphology, niche and phylogenetics
Yan-Feng Song1, Quan-Ru Liu1, Rui-Min Yu1,2
1Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, College of Life Sciences, Beijing Normal University, 100875 Beijing, China Beijing Normal University Beijing China.
Abstract:
Pterocarya serrata C.K.Schneid., originally described in 1912, has long been treated as a synonym of Cyclocarya paliurus (Batal.) Iljinsk. in Plants of the World Online (POWO). Based on an integrative framework combining ploidy determination, morphometric analyses, ecological niche comparisons, and molecular phylogenetics of mixed-ploidy populations, together with extensive herbarium and field investigations, we formally reinstate Pterocarya serrata as a distinct species within the genus Cyclocarya, recognizing three synonyms. Our results reveal clear phenotypic divergence and genetic differentiation between C. serrata and C. paliurus, which have evolved into separate evolutionary lineages. These findings refute the traditional treatment of Cyclocarya as a monotypic genus. Furthermore, we present the first comprehensive morphological descriptions, distribution records, and taxonomic notes for both C. serrata and C. paliurus, thereby advancing the systematic understanding of Cyclocarya.
Related Concept Videos
Asexual Reproduction
Multipotency and Niche of Bulge Stem Cell
Meiosis II
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
Stability of Substituted Cyclohexanes
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
Formation of Species
Disubstituted Cyclohexanes: cis-trans Isomerism
In cyclohexane, the substituents can occupy different positions generating distinct isomers....

